Molecular Insights on Dissolved Organic Matter Transformation by Supraglacial Microbial Communities

2017 ◽  
Vol 51 (8) ◽  
pp. 4328-4337 ◽  
Author(s):  
Runa Antony ◽  
Amanda S. Willoughby ◽  
Amanda M. Grannas ◽  
Victoria Catanzano ◽  
Rachel L. Sleighter ◽  
...  
Keyword(s):  
Organic Matter ◽  
Dissolved Organic Matter ◽  
Microbial Communities ◽  
Organic Matter Transformation

Invasive plant-derived dissolved organic matter alters microbial communities and carbon cycling in soils

2021 ◽  
pp. 108191
Author(s):  
Morgan Luce McLeod ◽  
Lorinda Bullington ◽  
Cory C. Cleveland ◽  
Johannes Rousk ◽  
Ylva Lekberg
Keyword(s):  
Organic Matter ◽  
Dissolved Organic Matter ◽  
Microbial Communities ◽  
Carbon Cycling ◽  
Invasive Plant

Metabolic and structural response of hyporheic microbial communities to variations in supply of dissolved organic matter

2003 ◽  
Vol 48 (4) ◽  
pp. 1608-1617 ◽  
Author(s):  
Stuart E. G. Findlay ◽  
Robert L. Sinsabaugh ◽  
William V. Sobczak ◽  
M. Hoostal
Keyword(s):  
Organic Matter ◽  
Dissolved Organic Matter ◽  
Microbial Communities ◽  
Structural Response

scholarly journals Nutrient availability as major driver of phytoplankton-derived dissolved organic matter transformation in coastal environment

2017 ◽  
Vol 137 (1-2) ◽  
pp. 93-104 ◽  
Author(s):  
Eero Asmala ◽  
Lumi Haraguchi ◽  
Hans H. Jakobsen ◽  
Philippe Massicotte ◽  
Jacob Carstensen
Keyword(s):  
Organic Matter ◽  
Dissolved Organic Matter ◽  
Nutrient Availability ◽  
Coastal Environment ◽  
Organic Matter Transformation

Dissolved organic matter transformation in the hyporheic zone of a small lowland river

2010 ◽  
Vol 39 (2) ◽  
Author(s):  
Piotr Zieliński ◽  
Elżbieta Jekatierynczuk-Rudczyk
Keyword(s):  
Organic Matter ◽  
Dissolved Organic Matter ◽  
Hyporheic Zone ◽  
Stream Water ◽  
Small Scale ◽  
Lowland River ◽  
Organic Matter Transformation ◽  
Doc Concentration ◽  
Different Depths ◽  
Study Sites

Dissolved organic matter transformation in the hyporheic zone of a small lowland riverThe objective of this study was to examine dissolved organic carbon (DOC) concentration and specific ultraviolet absorbance (SUVA) changes in porewaters that occur over a small scale (cm) in the hyporheic zone (HZ) of a lowland stream in the Knyszynska Forest in northeast Poland. Hyporheic zone porewaters were sampled at different depths of 10, 30, 50, 70 cm at two study sites with different sediment material. The results showed significant differences in DOC concentrations between the upper and lower stream HZ. The current results indicate that small lowland sediments provide both a source and a sink of DOC for stream water, depending on the river course. The higher DOC level observed in the hyporheic zone suggests that porewater can be an autonomic site of biogeochemical changes of dissolved organic matter, which is very clear in the SUVA fluctuations.

Benthic microbial utilization of differential dissolved organic matter sources in a forest headwater stream

2003 ◽  
Vol 33 (8) ◽  
pp. 1444-1451 ◽  
Author(s):  
David P Kreutzweiser ◽  
Scott S Capell
Keyword(s):  
Organic Matter ◽  
Dissolved Organic Matter ◽  
Microbial Communities ◽  
Community Respiration ◽  
Metabolic Profiles ◽  
Respiration Activity ◽  
Microbial Utilization ◽  
Mesocosm Experiments ◽  
Significant Change ◽  
Benthic Microbial Communities

Streamside mesocosm experiments were conducted in a low-order forest watershed to directly examine responses by microbial communities on standardized substrates to different terrestrial and aquatic sources of dissolved organic matter (DOM). Community respiration (oxygen uptake), microbial density (colony-forming units on agar plates), leaf decomposition, and community metabolic profiles (metabolism patterns in sole carbon source utilization assays) were measured. Stream benthic microbial communities responded immediately and positively to increases in terrestrially derived DOM. Respiration activity and density estimates increased significantly, but there was no significant change in community metabolic profile. Responses were greater to DOM extracted from upper soil horizons than from deeper soils. Community respiration and bacterial abundance also increased in response to an aquatic DOM source, but were accompanied by a significant change in community metabolic profiles. Results provide direct experimental evidence that benthic microbial communities of forest headwater streams are able to rapidly utilize terrestrial DOM.

Effects of different dissolved organic matter on microbial communities and arsenic mobilization in aquifers

2021 ◽  
Vol 411 ◽  
pp. 125146
Author(s):  
Yanhong Wang ◽  
Guanglong Zhang ◽  
Helin Wang ◽  
Yu Cheng ◽  
Han Liu ◽  
...  
Keyword(s):  
Organic Matter ◽  
Dissolved Organic Matter ◽  
Microbial Communities ◽  
Arsenic Mobilization

scholarly journals Vertical Stratification of Dissolved Organic Matter Linked to Distinct Microbial Communities in Subtropic Estuarine Sediments

2021 ◽  
Vol 12 ◽  
Author(s):  
Wenxiu Wang ◽  
Jianchang Tao ◽  
Ke Yu ◽  
Chen He ◽  
Jianjun Wang ◽  
...  
Keyword(s):  
Organic Matter ◽  
Dissolved Organic Matter ◽  
Microbial Communities ◽  
River Estuary ◽  
Niche Differentiation ◽  
Pearl River Estuary ◽  
Estuarine Sediments ◽  
Enzyme Families ◽  
The Pearl River ◽  
Dom Composition

Dissolved organic matter (DOM) provides carbon substrates and energy sources for sediment microbes driving benthic biogeochemical processes. The interactions between microbes and DOM are dynamic and complex and require the understanding based on fine-scale microbial community and physicochemical profiling. In this study, we characterized the porewater DOM composition in a 300-cm sediment core from the Pearl River estuary, China, and examined the interactions between DOM and archaeal and bacterial communities. DOM composition were highly stratified and associated with changing microbial communities. Compared to bacteria, the amplicon sequence variants of archaea showed significant Pearson correlations (r ≥ 0.65, P < 0.01) with DOM molecules of low H/C ratios, high C number and double bond equivalents, indicating that the distribution of archaea was closely correlated to recalcitrant DOM while bacteria were associated with relatively labile compounds. This was supported by the presence of auxiliary enzyme families essential for lignin degradation and bcrABCD, UbiX genes for anaerobic aromatic reduction in metagenome-assembled genomes of Bathyarchaeia. Our study demonstrates that niche differentiation between benthic bacteria and archaea may have important consequences in carbon metabolism, particularly for the transformation of recalcitrant organic carbon that may be predominant in aged marine sediments.

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